Abstract: A compact and fast-shifting two-speed transmission for an electric drive system, such as an electric vehicle, has two synchronized dog clutches. A sliding sleeve for engaging a first and second gear is actuatable using a single actuator. A substantially load-interruption-free shifting is realized via a friction engagement in the synchronization. A drive system having such a two-speed transmission is capable of achieving at least substantially load-interruption-free shifting.

Abstract: A planetary transmission (2) includes a stepped planetary gear (24), or planetary gears, which are connected to each other, that is/are disposed radially between a first shaft (6) and axially-adjacent first and second ring gears (12, 16). The stepped planetary gear, or connected planetary gears, include(s) a first gearing region (26) that meshes with a sun gear (8) on the first shaft (6) and the first ring gear (12), as well as a helically-toothed second gearing region (28) that meshes with the second ring gear (16). A cylindrical support region (32) is coaxially provided on/around the first shaft. The stepped planetary gear or the connected planetary gears is/are supported on the cylindrical support region of the first shaft by the outer circumferential surface of the second gearing region. The second gearing region lies on the addendum circle of the second gearing region.

Abstract: A compact and fast-shifting two-speed transmission for an electric drive system, such as an electric vehicle, has two synchronized dog clutches. A sliding sleeve for engaging a first and second gear is actuatable using a single actuator. A substantially load-interruption-free shifting is realized via a friction engagement in the synchronization. A drive system having such a two-speed transmission is capable of achieving at least substantially load-interruption-free shifting.

Abstract: A planetary transmission (2) includes a stepped planetary gear (24), or planetary gears, which are connected to each other, that is/are disposed radially between a first shaft (6) and axially-adjacent first and second ring gears (12, 16). The stepped planetary gear, or connected planetary gears, include(s) a first gearing region (26) that meshes with a sun gear (8) on the first shaft (6) and the first ring gear (12), as well as a helically-toothed second gearing region (28) that meshes with the second ring gear (16). A cylindrical support region (32) is coaxially provided on/around the first shaft. The stepped planetary gear or the connected planetary gears is/are supported on the cylindrical support region of the first shaft by the outer circumferential surface of the second gearing region. The second gearing region lies on the addendum circle of the second gearing region.

Abstract: A planetary gear (1, 20, 30, 40) for variable transmission, particularly a planetary gear for variable transmission towards a tail rotor of a helicopter. At least one gear set (s1, s2, s3, s4) of a sun gear (w4, w6, 21) comprises a ring gear (w1, w7), planetary wheels (2, 22, 32) and a planet carrier (w2, w3, w8). At least one clutch (k, K1, K2) and at least one freewheel (Fl, FL1, FL2) are provided for at least two different speeds of the planet carrier (w2, w3, w8) as output.

Abstract: A spur gear differential (1) having a first sun (3) and a second sun (5), wherein the first sun (3) is associated with a first set of planetary gears (7) and the second sun (5) is associated with a second set of planetary gears (9), and the first set of planetary gears (7) engages with the second set of planetary gears (9). The number of teeth (11) of the first sun (3) are equal to the number of teeth (12) of the second sun (5), and the teeth (11) of the first sun (3) are disposed by a profile shift on a crown circle (2) having a crown circle diameter (DK1) that differs from the crown circle diameter (DK2) of a crown circle on which the teeth (12) of the second sun (5) are disposed. The first set of planetary gears (7) engages only with the first sun (3) and the second set of planetary gears (9) engages only with the second sun (5).

Abstract: A transmission device, for a motor vehicle, with at least two drive output shafts and two multi-shaft planetary gearsets in active connection with one another. A shaft of a planetary gearset is actively connected with an output shaft and is shifted, between first and second power paths, such that in the first power path, torque of an electric machine is transmitted in equal parts and with the same sign to the output shafts, and in the second power path, torque is transmitted in equal parts but with different signs. One of the two planetary gearsets is made as a four-shaft, reduced coupling transmission with two sun gears and a common planetary gear carrier with radially inner and outer planetary gears that mesh with one another, and which are engaged, on the one hand, with the sun gears and, on the other hand, with a rotationally fixed ring gear.

Abstract: A transmission device with at least two output shafts and at least two multi-shaft planetary gearsets being actively connected. A shaft of each gearset can be actively connected with an output shaft. A shifting mechanism is provided, between the two output shafts, for shifting between a first power path and a second power path. In the area of a further shaft of one of the planetary gearsets, torque from an electric machine flows along the first or the second power path. When the first power path is engaged, the torque from the electric machine flows in equal parts and with the same sign to the two output shafts, and when the second power path is engaged, the torque flows to the two output shafts in equal parts but with opposite signs. A motor output shaft of the electric machine is arranged perpendicularly to one of the two output shafts.

Abstract: A transmission device with at least two output shafts and at least two multi-shaft planetary gearsets that are actively connected with one another. A shaft of a planetary gearset can be actively connected with an output shaft. In addition, a shifting mechanism, located between the two output shafts, shifts between a first power path or a second power path. In one of the planetary gearsets, torque from an electric machine can be transmitted along either the first or the second power path. In the first power path, torque from the electric machine is transmitted to the two output shafts in equal parts and with the same sign. In the second power path, torque is transmitted to the two output shafts in equal parts but with opposite signs. The planetary gearset, in the area of which the torque from the electric machine can be transmitted, is a simple negative planetary gearset.

Abstract: An apparatus for actuating a form-locking shift element which can at least be shifter between two shifting positions, of a transmission device having a drive device and a drive converter device for converting rotational drive motion of the drive device into translatory motion of the form-locking shift element. Two transmission shafts are interconnected, by way of the shift element, in a rotationally fixed manner in one shifting position, and are decoupled from one another in another shifting position. The drive converter device comprises a first component having at least one control curve, and a second component that is operatively connected to the first component which, in the region of the control curve, are connected to a component of the form-locking shift element, which is connected to one of the transmission shafts in a rotationally fixed manner and is axially displaceable.

Abstract: A spur gear differential (1) having a first sun (3) and a second sun (5), wherein the first sun (3) is associated with a first set of planetary gears (7) and the second sun (5) is associated with a second set of planetary gears (9), and the first set of planetary gears (7) engages with the second set of planetary gears (9). The number of teeth (11) of the first sun (3) are equal to the number of teeth (12) of the second sun (5), and the teeth (11) of the first sun (3) are disposed by a profile shift on a crown circle (2) having a crown circle diameter (DK1) that differs from the crown circle diameter (DK2) of a crown circle on which the teeth (12) of the second sun (5) are disposed. The first set of planetary gears (7) engages only with the first sun (3) and the second set of planetary gears (9) engages only with the second sun (5).

Abstract: A transmission device with at least two output shafts and at least two multi-shaft planetary gearsets that are actively connected with one another. A shaft of a planetary gearset can be actively connected with an output shaft. In addition, a shifting mechanism, located between the two output shafts, shifts between a first power path or a second power path. In one of the planetary gearsets, torque from an electric machine can be transmitted along either the first or the second power path. In the first power path, torque from the electric machine is transmitted to the two output shafts in equal parts and with the same sign. In the second power path, torque is transmitted to the two output shafts in equal parts but with opposite signs. The planetary gearset, in the area of which the torque from the electric machine can be transmitted, is a simple negative planetary gearset.

Abstract: A transmission device with at least two output shafts and at least two multi-shaft planetary gearsets being actively connected. A shaft of each gearset can be actively connected with an output shaft. A shifting mechanism is provided, between the two output shafts, for shifting between a first power path and a second power path. In the area of a further shaft of one of the planetary gearsets, torque from an electric machine flows along the first or the second power path. When the first power path is engaged, the torque from the electric machine flows in equal parts and with the same sign to the two output shafts, and when the second power path is engaged, the torque flows to the two output shafts in equal parts but with opposite signs. A motor output shaft of the electric machine is arranged perpendicularly to one of the two output shafts.

Abstract: A transmission device, for a motor vehicle, with at least two drive output shafts and two multi-shaft planetary gearsets in active connection with one another. A shaft of a planetary gearset is actively connected with an output shaft and is shifted, between first and second power paths, such that in the first power path, torque of an electric machine is transmitted in equal parts and with the same sign to the output shafts, and in the second power path, torque is transmitted in equal parts but with different signs. One of the two planetary gearsets is made as a four-shaft, reduced coupling transmission with two sun gears and a common planetary gear carrier with radially inner and outer planetary gears that mesh with one another, and which are engaged, on the one hand, with the sun gears and, on the other hand, with a rotationally fixed ring gear.

Abstract: A gear-changing device for a speed-changing transmission, in particular for motor vehicles, includes at least two pot-shaped gearwheels rotatably borne on a transmission shaft and a synchronizer clutch adapted to alternately couple the respective gearwheels with the transmission shaft. A sliding sleeve of the synchronizer clutch is displaceable over respective synchronizer rings, each having locking gear teeth, onto respective gear-selecting gear teeth of the gearwheels by actuation of a gear-changing rocker, which contacts diametrically opposing positions of the sliding sleeve. The two pot-shaped gearwheels have recesses facing towards each other and radially-outer gear rims. The gear-selecting gear teeth and, as much as possible the synchronizer clutch with the two synchronizer rings, are disposed in the recesses.

Abstract: The invention relates to a drive system, especially for motor vehicles, with a first power source (10), especially an internal combustion engine, and a second power source (20), especially an electric motor. The power sources acts upon a gearbox (14) that is provided with a plurality of gearwheel sets which modulate. The first power source is linked with the gearbox via a clutch (L1) and the second power source is linked with the gearbox directly. The aim of the invention is to provide a construction that is favorable both in terms of design and functionality. To this end, the first power source acts upon a shaft (12) that carries the one gearwheels of the gearwheel sets and the second power source acts upon a second shaft (16) that carries the other gearwheels of the gearwheel sets. A separate output shaft (22) can be optionally coupled to the first (12) or the second (16) shaft.

Abstract: An adjustment device for a rotational adjustment of two centrically mounted adapter pieces especially for a seat, preferably for a seat of a motor vehicle, includes a planetary gear with a sun wheel and planetary wheels. The planetary gear has a first housing part and a second housing part each with an internal toothing. The housing parts can be rotated relative to one another and are captively held on one another. Both housing parts have an edge flange. A separate retaining ring, which overlaps the edge flanges, holds the housing parts together. This allows to assemble the adjustment device in a simple manner and at low cost and ensures that the adjustment device functions even when subjected to high stress.

Abstract: The invention relates to a drive assembly, in particular for motor vehicles. Said assembly comprises a first drive source, in particular, an internal combustion engine and a second drive source, in particular, an electric motor. Said drive sources operate on a variable transmission as speed converters, whereby the first drive source is connected via a clutch to the transmission and the second drive source is connected directly to said transmission. In order to achieve an optimal construction in terms of form and function, the first drive source impinges upon a first conversion element of the variable transmission, the second drive source impinges upon the second conversion element and a separate drive shaft is provided which can be selectively coupled to the first or second conversion element.

Abstract: A transmission for motor vehicles having a conical-disc band transmission placed in a casing, a reduction gear and, if necessary, a differential. In order to achieve an optimum transmission-ratio range for motor vehicles and good efficiency, the reduction gear contains two forward speeds and is connected to a fixed gear on the power take-off shaft by means of an additional fixed gear. The driving disc pairs of the conical-disc band transmission are located directly on a section of the drive shaft and on the power take-off shaft. The reduction gear and the conical-disc band transmission can be actuated by means of conventional synchronous clutches. The transmission case is longitudinally fitted with a center wall which subdivides the space into two compartments, one of which is closed by a front cover and the other by a rear cover. While one compartment contains the reduction gear and, if necessary, the differential, the other compartment contains the conical-disc band transmission.

Abstract: A transmission comprises a rotatable output; a rotatable input; three planetary gear sets each having rotatable first, second and third elements and planet gears; rigid rotatable couplings connecting the second element of each set with one element of one other set and connecting the third element of each set with a different element of one other set, the remaining elements of each set being uncoupled and being of the same kind; a brake for locking each coupling against rotation; the uncoupled element of one set being driven by the input and the uncoupled element of a second set driving the output; and a clutch arrangement for selectively connecting the uncoupled element of the third set with either or both of the uncoupled elements of the first and second sets.